Quote Originally Posted by Remedi View Post
Thinking about it elidubus said that zenos was a good test subject so maybe it wasn't his idea only the resonant thing, maybe the emperor had an hand in it
Yes the research on Echo has been going on for a long time now in Garlemald.

While originally they killed Echo users because of belief that they were no different from Primals, the 1.0 Warriors of Light actions for being able to kill Primals changed this view and now the Garlean Empire see the Echo as a possible solution to their "Primal threat" thus they began experimenting on how to replicate the Echo and learning more about.

This has been going for some time since 2.0 as there have been hints Garlean Empire have been reasearching the Echo. It is only now we see the fruit of their labor with experimenting on Echo users in Garlemald.